Patents by Inventor Hironobu Kumagai

Hironobu Kumagai has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 11936276
    Abstract: A motor assembly includes a motor, an electric pump to supply oil to the motor, an inverter assembly connected to the motor, and a first wire harness and a second wire harness. The inverter assembly includes an inverter to convert a high-voltage direct current into an alternating current and supply the alternating current to the motor, and a controller to control the inverter and the electric pump. The first wire harness electrically connects an external power supply and the inverter assembly, and passes a low-voltage power supply line. The low-voltage power supply line is, at a branch point, branched into a controller power supply line to supply drive power to the controller and a pump power supply line to supply drive power to the electric pump.
    Type: Grant
    Filed: April 14, 2020
    Date of Patent: March 19, 2024
    Assignee: NIDEC CORPORATION
    Inventors: Keisuke Fukunaga, Yohei Miyata, Hironobu Kumagai
  • Publication number: 20230134155
    Abstract: One aspect of a drive apparatus of the present invention includes: a rotor having a shaft that rotates about a central axis; a stator disposed radially outside the rotor; a bus bar unit having a plurality of bus bars connected to the stator and a bus bar holder supporting the bus bars; a fluid feed portion disposed radially outside the stator and provided with a feed hole for feeding a fluid to the stator; and a housing that accommodates the rotor, the stator, the bus bar unit, and the fluid feed portion. The bus bar unit extends along the circumferential direction along the outer periphery of the stator and has an opening portion that opens toward the stator.
    Type: Application
    Filed: October 27, 2022
    Publication date: May 4, 2023
    Inventors: Hironobu KUMAGAI, Keisuke NAKATA
  • Publication number: 20230010604
    Abstract: A drive device includes a motor and an inverter. A motor axis is parallel to an output axis. The inverter is located in a second direction orthogonal to a first direction with respect to the motor axis and extends in a third direction orthogonal to the first and second directions. When viewed from the first direction, a virtual straight line passing through the axes extends in the third direction. An inverter housing portion overlaps the axes when viewed from the second direction, and has a boundary wall on the virtual straight line side in the second direction. In the second direction, a distance between the boundary wall and the output axis is smaller than a distance between the boundary wall and the motor axis. A motor side connection portion has a portion closer to the side opposite to the output axis than the motor axis in the third direction.
    Type: Application
    Filed: November 19, 2020
    Publication date: January 12, 2023
    Inventors: Yuki ISHIKAWA, Hitoshi KUROYANAGI, Naohiro WADA, Hironobu KUMAGAI, Hisashi FUJIHARA
  • Publication number: 20220393535
    Abstract: In a motor, a stator includes: a stator core having slots arranged in a circumferential direction; and conductor connection bodies with conductors connected in series and inserted into the slots. A conductor connection body includes: a first portion wave-wound toward one side in the circumferential direction from a first end to a second end; a second portion wave-wound toward the one side in the circumferential direction from a third end to a fourth end; and a folded portion connecting the first and second portions. The first and third ends protrude in an axial direction from different slots in the circumferential direction, and the second and fourth ends protrude in the axial direction from different slots in the circumferential direction. The conductors include a folded conductor that forms a folded portion connecting the second end of the first portion and the fourth end of the second portion.
    Type: Application
    Filed: May 23, 2022
    Publication date: December 8, 2022
    Inventors: Yuki ISHIKAWA, Hiroyuki ABE, Hironobu KUMAGAI
  • Publication number: 20220311301
    Abstract: A motor includes a rotor, a stator, and first and second bus bar disposed on one side in an axial direction of the stator. The stator includes a winding portion including conductor connection bodies in which conductors are connected in series and a stator core having slots through which the conductor connection body passes. The winding portion includes a coil end located on one side in the axial direction of the stator core. The conductor connection body includes first and second ends located at an outermost circumference in the radial direction of the coil end. The first bus bar is connected to the first end. The second bus bar is connected to the second end. The first bus bar is located on one side in the axial direction of the coil end. The second bus bar is located on the radial outside of the coil end.
    Type: Application
    Filed: March 17, 2022
    Publication date: September 29, 2022
    Inventors: Yuki ISHIKAWA, Hironobu KUMAGAI
  • Publication number: 20220286008
    Abstract: A motor includes a rotor, a stator, and a bus bar unit disposed on one side in an axial direction of the stator. The stator includes conductor connection bodies and a segment coil. Each connection body includes first and second ends in the axial direction. The bus bar unit includes a neutral point bus bar connected to the first end and phase bus bars connected to the second end. The neutral point bus bar extends along a circumferential direction. The phase bus bar includes a main body extending along the circumferential direction and at least partially overlapping the neutral point bus bar and a connection portion extending from the main body to one side in the axial direction. The first end passes through one side in the axial direction of the neutral point bus bar and is connected to the connection portion.
    Type: Application
    Filed: March 4, 2022
    Publication date: September 8, 2022
    Inventors: Yuki ISHIKAWA, Hironobu KUMAGAI
  • Publication number: 20220286006
    Abstract: A motor includes a rotor and a stator. The stator includes a stator core with slots, and conductor connection bodies connected in series and inserted into the slots. A plurality of straight portions of the conductor connection bodies include a first straight portion connected to a crossing portion and a second straight portion that is connected to one end of the folded portion and disposed in an innermost layer in the slot. In the slot, a distance between the second straight portion and the first straight portion located outside the second straight portion is larger than a distance between the first straight portions, and a protrusion direction in the radial direction of the folded portion with respect to the second straight portion and a protrusion direction in the radial direction of the crossing portion with respect to the first straight portion are different from each other.
    Type: Application
    Filed: March 2, 2022
    Publication date: September 8, 2022
    Inventors: Yuki Ishikawa, Hironobu Kumagai
  • Publication number: 20220200398
    Abstract: A motor assembly includes a motor, an electric pump to supply oil to the motor, an inverter assembly connected to the motor, and a first wire harness and a second wire harness. T The inverter assembly includes an inverter to convert a high-voltage direct current into an alternating current and supply the alternating current to the motor, and a controller to control the inverter and the electric pump. The first wire harness electrically connects an external power supply and the inverter assembly, and passes a low-voltage power supply line. The low-voltage power supply line is, at a branch point, branched into a controller power supply line to supply drive power to the controller and a pump power supply line to supply drive power to the electric pump.
    Type: Application
    Filed: April 14, 2020
    Publication date: June 23, 2022
    Inventors: Keisuke FUKUNAGA, Yohei MIYATA, Hironobu KUMAGAI
  • Patent number: 8563745
    Abstract: A process for producing 3,4-dichloro-5-cyanoisothiazole represented by a general formula (3): the process comprising: reacting a nitrile compound represented by a general formula (1): (wherein “n” denotes an integer of 0 to 2), with sulfur chloride represented by a general formula (2): SmCl2??(2) (wherein “m” represents an integer of 1 to 2), or a mixture thereof in an aprotic polar solvent. There is provided a process for producing 3,4-dichloro-5-cyanoisothiazole, which is capable of suppressing by-production of a waste, without using a raw material having a strong toxicity; and is capable of providing a product having a higher purity in a high yield and efficiency in an industrial scale, in a simple manner.
    Type: Grant
    Filed: April 30, 2010
    Date of Patent: October 22, 2013
    Assignee: Ihara Chemical Industry Co., Ltd.
    Inventors: Takayuki Nakamura, Hironobu Kumagai, Mahito Ogawa
  • Publication number: 20120046473
    Abstract: A process for producing 3,4-dichloro-5-cyanoisothiazole represented by a general formula (3): the process comprising: reacting a nitrile compound represented by a general formula (1): (wherein “n” denotes an integer of 0 to 2), with sulfur chloride represented by a general formula (2): [Chemical Formula 18] SmCl2 ??(2) (wherein “m” represents an integer of 1 to 2), or a mixture thereof in an aprotic polar solvent. There is provided a process for producing 3,4-dichloro-5-cyanoisothiazole, which is capable of suppressing by-production of a waste, without using a raw material having a having a strong toxicity; and is capable of providing a product having a higher purity in a high yield and efficiency in an industrial scale, in a simple manner.
    Type: Application
    Filed: April 30, 2010
    Publication date: February 23, 2012
    Applicant: IHARA CHEMICAL INDUSTRY CO., LTD.
    Inventors: Takayuki Nakamura, Hironobu Kumagai, Mahito Ogawa
  • Publication number: 20110306489
    Abstract: Disclosed is an ammonia decomposition catalyst which is obtained by heat-treating a complex at a temperature of 360° C. to 900° C. in a reducing atmosphere, wherein the complex containing a polymer having a molecular weight of 1,000 to 500,000 represented by the formula [I], a transition metal coordinated with the polymer, and an activated carbon or a carbon nanotube added thereto. In a case of using the carbon nanotube, an alkali metal compound or an alkaline earth metal compound is added to the heat-treated complex. R1 represents H or hydrocarbon having 1 to 10 carbon atoms, R2 and R3 each represent H, halogen, nitro, acyl, ester, carboxyl, formyl, nitrile, sulfone, aryl, or alkyl group having 1 to 15 carbon atoms, X and Y each represent H or OH, Z represents CH or N, R4 and R5 each represent H, OH, ether, amino, aryl, or alkyl group having 1 to 15 carbon atoms, x represents a real number of 1 to 2, y represents a real number of 1 to 3, and n represents a real number of 2 to 120.
    Type: Application
    Filed: February 18, 2010
    Publication date: December 15, 2011
    Applicants: HITACHI ZOSEN CORPORATION, IHARA CHEMICAL INDUSTRY CO., LTD., TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Susumu Hikazudani, Takuma Mori, Chikashi Inazumi, Haruyuki Nakanishi, Hidekazu Arikawa, Hironobu Kumagai
  • Patent number: 7951903
    Abstract: A hydrazone compound represented by a General Formula (1) below, a hydrazone compound for forming a metal complex, which is represented by the General Formula (1) below and forms a metal complex by coordination to at least one metal species, a ligand for forming a metal complex including the hydrazone compound, and a monomer for manufacturing a polymer compound including the hydrazone compound: wherein, Py represents a 2-pyridyl group, a 3-pyridyl group, or a 4-pyridyl group.
    Type: Grant
    Filed: August 29, 2008
    Date of Patent: May 31, 2011
    Assignees: Toyota Jidosha Kabushiki Kaisha, Ihara Chemical Industry Co., Ltd.
    Inventors: Haruyuki Nakanishi, Shinichi Matsumoto, Hidekazu Arikawa, Hironobu Kumagai
  • Patent number: 7632954
    Abstract: A novel substituted Sym-triindole derivative that is applicable to a wide spectrum of uses, such as various electrification preventions, electrification controls, capacitors, batteries, chemical sensors, displays, organic EL materials, solar cells, photodiodes, phototransistors, nonlinear materials, photorefractive materials, rustproof agents, adhesives, fibers, antistatic paints, electrodeposition paints, plating primers, electric corrosion protections and the like. There is provided a substituted Sym-triindole derivative of the general formula (1) (wherein R1, R2, R3 and R4 are each independently hydrogen, a halogen, a C1-C6 alkyl or the like, provided that, in no event, all of R1, R2, R3 and R4 are hydrogen simultaneously).
    Type: Grant
    Filed: February 14, 2005
    Date of Patent: December 15, 2009
    Assignee: Ihara Chemical Industry Co., Ltd.
    Inventors: Hidetaka Hiyoshi, Hironobu Kumagai, Hideo Ooi
  • Publication number: 20090062507
    Abstract: A hydrazone compound represented by a General Formula (1) below, a hydrazone compound for forming a metal complex, which is represented by the General Formula (1) below and forms a metal complex by coordination to at least one metal species, a ligand for forming a metal complex including the hydrazone compound, and a monomer for manufacturing a polymer compound including the hydrazone compound: wherein, Py represents a 2-pyridyl group, a 3-pyridyl group, or a 4-pyridyl group.
    Type: Application
    Filed: August 29, 2008
    Publication date: March 5, 2009
    Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, IHARA CHEMICAL INDUSTRY CO., LTD.
    Inventors: Haruyuki NAKANISHI, Shinichi Matsumoto, Hidekazu Arikawa, Hironobu Kumagai
  • Publication number: 20070191455
    Abstract: A novel substituted Sym-triindole derivative that is applicable to a wide spectrum of uses, such as various electrification preventions, electrification controls, capacitors, batteries, chemical sensors, displays, organic EL materials, solar cells, photodiodes, phototransistors, nonlinear materials, photorefractive materials, rustproof agents, adhesives, fibers, antistatic paints, electrodeposition paints, plating primers, electric corrosion protections and the like. There is provided a substituted Sym-triindole derivative of the general formula (1) (wherein R1, R2, R3 and R4 are each independently hydrogen, a halogen, a C1-C6 alkyl or the like, provided that, in no event, all of R1, R2, R3 and R4 are hydrogen simultaneously).
    Type: Application
    Filed: February 14, 2005
    Publication date: August 16, 2007
    Inventors: Hidetaka Hiyoshi, Hironobu Kumagai, Hideo Ooi